Method of forming stitches



`making o'r formingA stitches.

UNITED STATES PATFNT OFFICE.

ALFRED A. ouMINc, oF HINGHAFLMASSACHUSFTTS.

METHOD koF FORNHNG sTlToHEs.

SPECIFICATION forming part of `Letters Patent No. 413,647, dated October29,1889.

Application filed January 21, 1889. Serial No. 297,046. (No model.)

To all whom it mag/concern:

y Be it known that I', ALFRED A. CUMNG, of Hingham, in the county ofPlymouth and State of Massachusetts, a citizen of the United States,have invented a new and useful Im-` provement in Methods of FormingStitches, of which the following is a full, clear, and eX- actdescription, reference being had to the accompanying drawings, forming apart of this specification, in explaining its nature.

The invention relates .to the method of In the formation of the stitchthe bight or loop of one thread is passed througha hole in the matcrialor the sections which are to be united by the stitch and the loopenlarged or expanded upon the other or opposite side of the material,and through this loopV is carried by a suitable carrier another or underthread in thev form of a loop,'and at the same time or immediatelyfollowing another or third thread, preferably smaller than the othertwo, is by a suitable carrier introduced through the loop of the secondthread. The tWo under threads thus looped together are then drawn intothe hole in the material or fabric y and the loops are turned onthemselves, and

the loop of v thethird thread serves to fasten or lock the stitch formedby the first and second threads.

In the drawings, Figure 1 is a View representing the upper stitchcarried through a hole in the material and a loop formed there- H on.Fig. 2 represents the loop of one of the under threads passed throughthe loop of the upper thread.` Fig. 3 represents vthe loop of the thirdthread passed through the loop of the under thread and one completestitch,

and Figs. 4 and 5 vrepresent the invention applied to a Astitch usingtwo upper threads in forming two seams, y

a represents the single or upper thread.

' It is fed downward through a hole a', formed in the material in whichthe stitch is seWed or the sections of which are to be united, and

a loop a2 formed, through which the loop a3 of :an under thread-b iscarried.V The loop a4 of another under thread b', preferably smallerthan the first and second threads, is then introduced through the loopa3 of the thread b.

' The lower thread h is then drawn upon the loop a4, the upper threaddrawn back with the loops a3 a4 into the hole a', and the said loopswill completely ll the center of the hole and bind closely therein.

It will be seen that the threads a and b are the principal or holdingthreads, and that the thread b is an auxiliary or locking thread, whichis passed th rough the loop of the thread b and acts as a cross-bar orlocking device in preventing the said loop from becoming disengaged fromthe loop of the thread a, and if at any time it is desired to separatethe stitches thelocking-thread b may be Withdrawn and the loop a2separated from the loop a3.

In Fig. 5 Ihave represented the invention as applied to a double line ofstitches, there being two upper threads a, a single lower thread b,which passes through each loop of the two upper threads, and a singlelockingthread b', the loop of which passes or enters the loop of thesingle under thread b. While I have" spoken of the threads as upper andunder, I would not be understood as coniining myself to this location,as the threads which I have called under maybe upon the upperY side, andthe other, which I have termed the upper,7 may be upon the under side ofthe fabric.

I do not confine myself to the form or arrangement of devices used formaking the described stitch or practicing the process.

Having thus fully described my invention, I claim and desire to secureby Letters Patent of the United States- The method of forming a stitchwhich comprises passing a thread through a hole in the material orpieces to b e united, forming a loop upon the opposite side of saidmaterial; second, in passing into and through said loop a loop ofanother thread; third, in passing through the second loop a loop ofstill another or locking thread, and, fourth, drawing the loops of saidthreads into the hole of the material or fabric, substantially asdescribed.

i ALFRED A. CUMING.

l Witnesses:

J. M. DoLAN, F. F. RAYMOND, 2d.

